the pictures look to me very much like the moonshines which are a T . The moonshines however turn a very bright yellow as adults whereas this one is a much lighter color. This difference could also be due to the difference in locality phenotype. The moonshines from Horry County, SC are the greenish ratsnakes from the black/yellow integrade zone and turn bright yellow as adults whereas yours is from southern MD full fledged black as they get black ratsnakes so they turn out a lighter color. Just my theory. WOuld be interesting to test breed one of yours to a moonshine to see if all visuals hatch out. I tried to pm you but it wasn't successful.
Did you breed yours to a female from the same locality? I too herp southern MD from time to time in St Marys and Calvert and would love a pair of offspring. Locale specific morphs are what I like!